Doctoral Dissertations

Title

Structural role of nitrogen in phosphorus oxynitride glasses

Abstract

"This dissertation contains the results of six years of research on phosphorus oxynitride glasses. The main body is composed of three papers to be submitted for publication; the first on the preparation and properties of sodium ultraphosphate glasses, the second a review of the phosphorus oxynitride glasses, and the third a structural model for nitrogen incorporation. Appendices A, B, and C contain reprints of three articles co-authored by this author which have already been published in various journals.

Appendix A, "Preparation of Phosphorus Oxynitride Glasses," published in the Journal of Non-Crystalline Solids in 1986 describes the preparation of oxynitride glass made by melting sodium metaphosphate in anhydrous ammonia gas. Changes in the dissolution rate in water, thermal expansion coefficient, dilatometric softening point and glass transition temperatures, refractive index, microhardness, and electrical conductivity are reported. Models are proposed for nitrogen dissolution in phosphate melts.

Appendix B, "Structure of Phosphorus Oxynitride Glasses," published in the Journal of the American Ceramic Society in 1987 resulted from the collaboration of researchers at Sandia National Laboratories, University of Illinois-Urbana and myself at the University of Missouri-Rolla. This author prepared and measured various chemical and thermal properties for the samples used for the Nuclear Magnetic Resonance (NMR) and Raman measurements. The Raman analyses were performed at Sandia National Laboratories and the NMR spectra were measured at the University of Illinois-Urbana. Samples for the NMR measurements had to be prepared with 15N in the form of 15NH3. Because of the expense of 15N ammonia, this author developed a recirculating atmosphere furnace and other equipment to produce these special samples. These are the first phosphorus oxynitride glasses ever prepared with 15N.

Appendix C, "Oxygen Bonding in Nitrided Sodium- and Lithium-Metaphosphate Glasses," published in the Journal of Non-Crystalline Solids in 1988 resulted from joint work between myself at the University of Missouri-Rolla and Dr. R. K. Brow at Sandia National Laboratories. Samples prepared by this author were used for the x-ray photoelectron spectroscopy (XPS) measurements performed at Sandia National Laboratories. The XPS equipment was specially designed to collect spectra for structural analysis. The specimens were fractured in the ultra vacuum chamber of the XPS instrument in order to avoid surface contamination and damage which would obscure the structural information contained in the XPS spectra"--Abstract, pages iv-v.

Advisor(s)

Day, D. E.

Committee Member(s)

Anderson, H. U. (Harlan U.)
Moore, Robert E., 1930-2003
Ownby, P. D.
Sparlin, Don M.

Department(s)

Materials Science and Engineering

Degree Name

Ph. D. in Ceramic Engineering

Publisher

University of Missouri--Rolla

Publication Date

Fall 1989

Pagination

xii, 178 pages

Note about bibliography

Includes bibliographical references.

Rights

© 1989 Mary Rose Cripe Reidmeyer, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type

text

Language

English

Thesis Number

T 5943

Print OCLC #

22039349

Electronic OCLC #

1053889969

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu/record=b2136904~S5

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